I love 3D and all things over-powered, but I think for sport flying on that plane, the DLE20 would be great! It is called the 4 Star 120 after all...

I maidened 2 planes for a buddy this past summer: a Phoenix Decathlon with a Magnum .52, and a TF Cessna (81" wing) with a Magnum .91. Both were at the low end of the recommended power by the manufacturers. The Decathlon was a turd; it would barely pull a loop, even with a slight dive entry, but the Cessna suprised me. It had plenty of power to pull a loop and flew very "scale", even somewhat sport-like. Both, however, flew "on the wing" and weren't bad to fly at all. By all reports, the DLE 20 is a match for 4 stroke 1.20's and then some, so it should fly that plane quite well...